Gree GKH12K3BI, Service Manual

Page: 87 / 209

84
U-MATCH Air
Conditioners
Service Manual
MAINTENANCE
1 TROUBLE TABLE
Trouble
Code
Trouble Name
Origin of
Trouble Signal
Control Description
E0 Pump Failure Pump
If water full protection continues for 2 hours and fails to
restore, it is believed that the water pump is at fault and all
loads are shut off and fail to restore automatically.
E1
Compressor High
Pressure Protection
High voltage switch
When high voltage protection is detected for continuous 3 seconds,
all loads are shut off (except for the four way valve), all buttons and
remote control signals except for power-on or power-off are shielded
and fail to restore automatically, the unit should be powered off and
on, or failure should be removed after power supply is restored.
E2
Indoor Frost-Proof
Protection
Evaporator of
indoor unit
Thermal bulb
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for a period of time and evaporator thermal bulb is detected to be
lower than -2
o
C, the unit will report a fault and stops the compressor
and the outdoor unit. The unit will begin to operate after temperature
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o
C and the compressor keeps outage for 3 minutes.
E3
Compressor Low
Pressure Protection
Low voltage switch
When the unit is started or at standby (detection will begin 3 minutes after
the compressor is started up) and detected breakdown of the low voltage
switch for continuous 30 seconds, a fault is reported. The unit can be
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The third reported fault and so on can not be restored automatically.
E4
Compressor Exhaust High
Temperature Protection
Discharge
thermal bulb
After the compressor is started, if discharge temperature is detected to
be more than or equal to 130 degree for continuous 30 seconds, E4 will
be displayed, all loads (except for the four way valve) will be shut off, the
compressor will stop for 3 minutes and the complete system will restore
after discharge temperature is lower than 90 degree. If such fault is reported
for successive three times, the protection can not be restored itself.
E5
Compressor
Overheat
Compressor
After the compressor is started, if the overload switch of the compressor
is detected to shut off, the fault is reported. All loads (except for the
four way valve) are shut off, the fault is displayed, and the compressor
will stop for 3 minutes. If the fault is removed, the compressor can be
restarted to run. If successive three compressor overload protection faults
are detected within 30 minutes, the unit can not be restored itself and
the buzzer will give out an alarm. Push the ON/OFF button to shut off
the unit. And then push ON/OFF button again, if high voltage protection
disappears, operation will restore, or otherwise, the fault is displayed.
E6
Communications
Failure
Communication
When outdoor unit is energized and fails to receive data of indoor unit
within 30 seconds, an indoor unit communication fault is reported. The
compressor and the outdoor unit will be shut off, and the four way valve
will be stopped 2 minutes after the compressor outage in heating state.
If indoor unit fails to receive information of outdoor unit, a
communication fault is reported. The indoor unit is shut off and an
indicator is twinkling. If the display board fails to receive information
of outdoor unit, a communication fault is determined and displayed
and the unit does not actuate. After communication becomes normal,
the system can restore to the previous running state itself.
E8
Indoor Fan
Protection
Indoor unit
If fan overload protection is detected for continuous 3 seconds,
relevant compressor and fan shall be shut off immediately and a
fault code E8 is displayed, and at the same time, the buzzer gives
out an alarm. Push the ON/OFF key, if the fault disappears, clear the
fault display and push the ON/OFF key for restarting the system.
E9
Full Water
Protection
Liquid level switch
Water full is detected for continuous 8 seconds after the system is powered
on, the water full protection is initiated and the indicator is twinkling (or E9
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fan and the compressor are shut off and the indoor fan stops after 1 minute
delay; under heating mode, he outdoor fan and the compressor are shut off,
the four way valve keeps at the previous status, and the indoor fan stops
after 1 minute delay; under air supply mode, the load of indoor unit remains.